/*
 * Copyright 2024 Taskflow, Inc.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.feiliu.taskflow.expression;

import java.util.List;

/**
 * @author SHOUSHEN.LUAN
 * @since 2024-09-08
 */
abstract class AbstractPathExpression implements PathExpression {

    String getExpression(List<String> parts) {
        return "${" + join(parts) + "}";
    }

    String join(List<String> parts) {
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < parts.size(); i++) {
            builder.append(parts.get(i));
            if (parts.size() != i + 1) {
                builder.append(".");
            }
        }
        return builder.toString();
    }
}